USCG USCG Steam
Set 13 • Question #144 of 496
Launch Interactive Practice Room Under normal conditions, steam to the DC heater is supplied directly from which of the systems listed?
A
Main steam
B
600 psi auxiliary steam
C
150 psi auxiliary steam
D
Auxiliary exhaust steam
✓ Correct Answer
USCG NMC Regulatory Explanation
The Deaerating Feed Tank (DFT / DC Heater) scrubs dissolved oxygen and non-condensable gases from boiler feedwater using direct contact steam heating, preventing localized oxygen pitting corrosion in economizers and steam drums.
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